<%@ page contentType="text/html;charset=UTF-8" language="java" pageEncoding="UTF-8" %>
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8" />
  <title></title>
  <style type="text/css">
    #head{
      width: 100%;
      height: 50px;
      text-align: center;
      font-size: 18px;
      color: white;
      background-color: #000000;
      padding-top: 20px;
    }
  </style>
</head>
<body>
<header id="head">这是头部信息</header>
</body>
</html>